50890c8a4a
git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@14920 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd
1204 lines
43 KiB
Perl
1204 lines
43 KiB
Perl
package xCAT_plugin::ddns;
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use strict;
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use Getopt::Long;
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use Net::DNS;
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use File::Path;
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use xCAT::Table;
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use Sys::Hostname;
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use xCAT::TableUtils;
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use xCAT::NetworkUtils qw/getipaddr/;
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use Math::BigInt;
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use MIME::Base64;
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use xCAT::SvrUtils;
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use Socket;
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use Fcntl qw/:flock/;
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# This is a rewrite of DNS management using nsupdate rather than
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# direct zone mangling
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my $callback;
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my $distro = xCAT::Utils->osver();
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my $service="named";
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# is this ubuntu ?
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if ( $distro =~ /ubuntu.*/i || $distro =~ /debian.*/i ){
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$service = "bind9";
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}
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sub handled_commands
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{
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my @entries = xCAT::TableUtils->get_site_attribute("dnshandler");
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my $site_entry = $entries[0];
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unless ( defined($site_entry)) {
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return {"makedns" => "ddns"};
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}
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return {"makedns" => "site:dnshandler"};
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}
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sub getzonesfornet {
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my $netent = shift;
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my $net = $netent->{net};
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my $mask = $netent->{mask};
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my @zones = ();
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if ($netent->{ddnsdomain}) {
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push @zones,$netent->{ddnsdomain};
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}
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if ($net =~ /:/) {#ipv6, for now do the simple stuff under the assumption we won't have a mask indivisible by 4
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$net =~ s/\/(.*)//;
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my $maskbits=$1;
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if ($maskbits%4) {
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die "Not supporting having a mask like $mask on an ipv6 network like $net";
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}
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my $netnum= getipaddr($net,GetNumber=>1);
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unless ($netnum) { return (); }
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$netnum->brsft(128-$maskbits);
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my $prefix=$netnum->as_hex();
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my $nibbs=$maskbits/4;
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$prefix =~ s/^0x//;
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my $rev;
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foreach (reverse(split //,$prefix)) {
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$rev .= $_.".";
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$nibbs--;
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}
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while ($nibbs) {
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$rev .= "0.";
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$nibbs--;
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}
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$rev.="ip6.arpa.";
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push @zones,$rev;
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return @zones;
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}
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#return all in-addr reverse zones for a given mask and net
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#for class a,b,c, the answer is easy
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#for classless, identify the partial byte, do $netbyte | (0xff&~$maskbyte) to get the highest value
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#return sequence from $net to value calculated above
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#since old bind.pm only went as far as class c, we will carry that over for now (more people with smaller than class c complained
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#and none hit the theoretical conflict. FYI, the 'official' method in RFC 2317 seems cumbersome, but maybe one day it makes sense
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#since this is dhcpv4 for now, we'll use the inet_aton, ntop functions to generate the answers (dhcpv6 omapi would be nice...)
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my $netn = inet_aton($net);
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my $maskn = inet_aton($mask);
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unless ($netn and $mask) { return (); }
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my $netnum = unpack('N',$netn);
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my $masknum = unpack('N',$maskn);
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if ($masknum >= 0xffffff00) { #treat all netmasks higher than 255.255.255.0 as class C
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$netnum = $netnum & 0xffffff00;
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$netn = pack('N',$netnum);
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$net = inet_ntoa($netn);
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$net =~ s/\.[^\.]*$//;
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return (join('.',reverse(split('\.',$net))).'.IN-ADDR.ARPA.');
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} elsif ($masknum > 0xffff0000) { #(/17) to /23
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my $tempnumber = ($netnum >> 8);
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$masknum = $masknum >> 8;
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my $highnet = $tempnumber | (0xffffff & ~$masknum);
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foreach ($tempnumber..$highnet) {
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$netnum = $_ << 8;
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$net = inet_ntoa(pack('N',$netnum));
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$net =~ s/\.[^\.]*$//;
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push @zones,join('.',reverse(split('\.',$net))).'.IN-ADDR.ARPA.';
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}
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return @zones;
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} elsif ($masknum > 0xff000000) { # (/9) to class b /16, could have made it more flexible, for for only two cases, not worth in
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my $tempnumber = ($netnum >> 16); #the last two bytes are insignificant, shift them off to make math easier
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$masknum = $masknum >> 16;
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my $highnet = $tempnumber | (0xffff & ~$masknum);
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foreach ($tempnumber..$highnet) {
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$netnum = $_ << 16; #convert back to the real network value
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$net = inet_ntoa(pack('N',$netnum));
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$net =~ s/\.[^\.]*$//;
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$net =~ s/\.[^\.]*$//;
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push @zones,join('.',reverse(split('\.',$net))).'.IN-ADDR.ARPA.';
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}
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return @zones;
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} else { #class a (theoretically larger, but those shouldn't exist)
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my $tempnumber = ($netnum >> 24); #the last two bytes are insignificant, shift them off to make math easier
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$masknum = $masknum >> 24;
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my $highnet = $tempnumber | (0xff & ~$masknum);
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foreach ($tempnumber..$highnet) {
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$netnum = $_ << 24; #convert back to the real network value
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$net = inet_ntoa(pack('N',$netnum));
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$net =~ s/\.[^\.]*$//;
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$net =~ s/\.[^\.]*$//;
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$net =~ s/\.[^\.]*$//;
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push @zones,join('.',reverse(split('\.',$net))).'.IN-ADDR.ARPA.';
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}
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return @zones;
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}
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}
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sub get_reverse_zones_for_entity {
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my $ctx = shift;
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my $node = shift;
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my $net;
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if (($node =~ /loopback/) || ($node =~ /localhost/))
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{
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# do not use DNS to resolve localhsot
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return;
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}
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if ($ctx->{hoststab} and $ctx->{hoststab}->{$node} and $ctx->{hoststab}->{$node}->[0]->{ip}) {
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$node = $ctx->{hoststab}->{$node}->[0]->{ip};
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}
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my @tvars=getipaddr($node,GetNumber=>1,GetAllAddresses=>1);
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my $tvar;
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my @revs;
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foreach $tvar (@tvars) {
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foreach my $net (keys %{$ctx->{nets}}) {
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if ($ctx->{nets}->{$net}->{netn} == ($tvar & $ctx->{nets}->{$net}->{mask})) {
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if ($net =~ /\./) { #IPv4/IN-ADDR.ARPA case.
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my $maskstr = unpack("B32",pack("N",$ctx->{nets}->{$net}->{mask}));
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my $maskcount = ($maskstr =~ tr/1//);
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if ($maskcount >= 24)
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{
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$maskcount-=($maskcount%8); #e.g. treat the 27bit netmask as 24bit
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}
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else
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{
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$maskcount+=((8-($maskcount%8))%8); #round to the next octet
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}
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my $newmask = 2**$maskcount -1 << (32 - $maskcount);
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my $rev = inet_ntoa(pack("N",($tvar & $newmask)));
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my @zone;
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my @orig=split /\./,$rev;
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while ($maskcount) {
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$maskcount-=8;
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unshift(@zone,(shift @orig));
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}
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$rev = join('.',@zone);
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$rev .= '.IN-ADDR.ARPA.';
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push @revs,$rev;
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} elsif ($net =~ /:/) {#v6/ip6.arpa case
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$net =~ /\/(.*)/;
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my $maskbits = $1;
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unless ($maskbits and (($maskbits%4)==0)) {
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die "Never expected this, $net should have had CIDR / notation... and the mask should be a factor of 4, if not, need work..."
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}
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my $netnum = Math::BigInt->new($ctx->{nets}->{$net}->{netn});
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$netnum->brsft(128-$maskbits);
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my $prefix=$netnum->as_hex();
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my $nibbs=$maskbits/4;
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$prefix =~ s/^0x//;
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my $rev;
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foreach (reverse(split //,$prefix)) {
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$rev .= $_.".";
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$nibbs--;
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}
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while ($nibbs) {
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$rev .= "0.";
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$nibbs--;
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}
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$rev.="ip6.arpa.";
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push @revs,$rev;
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}
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}
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}
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}
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return @revs;
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}
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sub process_request {
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my $request = shift;
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$callback = shift;
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my $oldmask = umask(0007);
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my $ctx = {};
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my @nodes=();
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my $hadargs=0;
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my $allnodes;
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my $zapfiles;
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my $help;
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my $deletemode=0;
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my $external=0;
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if ($request->{arg}) {
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$hadargs=1;
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@ARGV=@{$request->{arg}};
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Getopt::Long::Configure("no_pass_through");
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Getopt::Long::Configure("bundling");
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if (!GetOptions(
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'a|all' => \$allnodes,
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'n|new' => \$zapfiles,
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'd|delete' => \$deletemode,
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'e|external' => \$external,
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'h|help' => \$help,
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)) {
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#xCAT::SvrUtils::sendmsg([1,"TODO: makedns Usage message"], $callback);
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makedns_usage($callback);
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umask($oldmask);
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return;
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}
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}
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if ($help)
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{
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makedns_usage($callback);
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umask($oldmask);
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return;
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}
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if ($deletemode && (!$request->{node}->[0]))
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{
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makedns_usage($callback);
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umask($oldmask);
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return;
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}
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$ctx->{deletemode}=$deletemode;
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# check for site.domain
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my @entries = xCAT::TableUtils->get_site_attribute("domain");
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my $site_entry = $entries[0];
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unless ( defined($site_entry)) {
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xCAT::SvrUtils::sendmsg([1,"domain not defined in site table"], $callback);
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umask($oldmask);
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return;
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}
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$ctx->{domain} = $site_entry;
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if($external) #need to check if /etc/resolv.conf existing
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{
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my $resolv = "/etc/resolv.conf";
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my $cmd = "egrep '^nameserver|^search' $resolv";
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my $acmd = "egrep '^nameserver|^domain' $resolv";
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if (xCAT::Utils->isAIX())
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{
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$cmd = $acmd;
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}
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my @output=xCAT::Utils->runcmd($cmd, 0);
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if ($::RUNCMD_RC != 0)
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{
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xCAT::SvrUtils::sendmsg([1,"You are using -e flag to update DNS records to an external DNS server, please ensure /etc/resolv.conf existing and pointed to this external DNS server."], $callback);
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umask($oldmask);
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return;
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}
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}
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# check for selinux disabled
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my $rc=xCAT::Utils->isSELINUX();
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if ($rc == 0)
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{
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xCAT::SvrUtils::sendmsg([0,"Warning:SELINUX is not disabled. The makedns command will not be able to generate a complete DNS setup. Disable SELINUX and run the command again."], $callback);
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}
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my $networkstab = xCAT::Table->new('networks',-create=>0);
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unless ($networkstab) { xCAT::SvrUtils::sendmsg([1,'Unable to enumerate networks, try to run makenetworks'], $callback); }
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my @networks = $networkstab->getAllAttribs('net','mask','ddnsdomain','domain','nameservers');
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if ($request->{node}) { #we have a noderange to process
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@nodes = @{$request->{node}};
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} elsif ($allnodes) {
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#read all nodelist specified nodes
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} else {
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if ($deletemode) {
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#when this was permitted, it really ruined peoples' days
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xCAT::SvrUtils::sendmsg([1,"makedns -d without noderange or -a is not supported"],$callback);
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umask($oldmask);
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return;
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}
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#legacy behavior, read from /etc/hosts
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my $hostsfile;
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open($hostsfile,"<","/etc/hosts");
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flock($hostsfile,LOCK_SH);
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my @contents = <$hostsfile>;
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flock($hostsfile,LOCK_UN);
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close($hostsfile);
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my $domain;
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my $addr;
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my $name;
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my $canonical;
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my $aliasstr;
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my @aliases;
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my $names;
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my @hosts;
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my %nodehash;
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foreach (@contents) {
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chomp; #no newline
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s/#.*//; #strip comments;
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s/^[ \t\n]*//; #remove leading whitespace
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next unless ($_); #skip empty lines
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($addr,$names) = split /[ \t]+/,$_,2;
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if ($addr !~ /^\d+\.\d+\.\d+\.\d+$/ and $addr !~ /^[abcdef0123456789:]+$/) {
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xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, address seems malformed.", $callback);
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next;
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}
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unless ($names =~ /^[a-z0-9\. \t\n-]+$/i) {
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xCAT::SvrUtils::sendmsg(":Ignoring line $_ in /etc/hosts, names $names contain invalid characters (valid characters include a through z, numbers and the '-', but not '_'", $callback);
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next;
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}
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my ($host, $ip) = xCAT::NetworkUtils->gethostnameandip($addr);
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push @hosts, $host;
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$nodehash{$addr}{names}=$names;
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$nodehash{$addr}{host}=$host;
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}
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# get the domains for each node - one call for all nodes in hosts file
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my $nd = xCAT::NetworkUtils->getNodeDomains(\@hosts);
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my %nodedomains = %$nd;
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foreach my $n (keys %nodehash) {
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$addr=$n;
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$names=$nodehash{$n}{names};
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# - need domain for this node
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my $host = $nodehash{$n}{host};
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$domain=$nodedomains{$host};
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unless ($domain =~ /^\./) { $domain = '.'.$domain; }
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($canonical,$aliasstr) = split /[ \t]+/,$names,2;
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if ($aliasstr) {
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@aliases= split /[ \t]+/,$aliasstr;
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} else {
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@aliases = ();
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}
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my %names = ();
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my $node = $canonical;
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xCAT::SvrUtils::sendmsg(":Handling $node in /etc/hosts.", $callback);
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unless ($canonical =~ /$domain/) {
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$canonical.=$domain;
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}
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# for only the sake of comparison, ensure consistant dot suffix
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unless ($canonical =~ /\.\z/) { $canonical .= '.' }
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foreach my $alias (@aliases) {
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unless ($alias =~ /$domain/) {
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$alias .= $domain;
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}
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unless ($alias =~ /\.\z/) {
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$alias .= '.';
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}
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if ($alias eq $canonical) {
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next;
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}
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# remember alias for CNAM records later
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$ctx->{aliases}->{$node}->{$alias}=1;
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}
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# exclude the nodes not belong to any nets defined in networks table
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# because only the nets defined in networks table will be add
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# zones later.
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my $found = 0;
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foreach (@networks)
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{
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if(xCAT::NetworkUtils->ishostinsubnet($addr, $_->{mask}, $_->{net}))
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{
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$found = 1;
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}
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}
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if ($found)
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{
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push @nodes,$node;
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$ctx->{nodeips}->{$node}->{$addr}=1;
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}
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else
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{
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unless ($node =~ /localhost/)
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{
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xCAT::SvrUtils::sendmsg(":Ignoring host $node in /etc/hosts, it does not belong to any nets defined in networks table.", $callback);
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}
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}
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}
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}
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my $hoststab = xCAT::Table->new('hosts',-create=>0);
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if ($hoststab) {
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$ctx->{hoststab} = $hoststab->getNodesAttribs(\@nodes,['ip']);
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}
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$ctx->{nodes} = \@nodes;
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foreach (@networks) {
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my $maskn;
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if ($_->{mask}) { #better be IPv4, we only do CIDR for v6, use the v4/v6 agnostic just in case
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$maskn = getipaddr($_->{mask},GetNumber=>1); #pack("N",inet_aton($_->{mask}));
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} elsif ($_->{net} =~ /\/(.*)/) { #CIDR
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my $maskbits=$1;
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my $numbits;
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if ($_->{net} =~ /:/) { #v6
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$numbits=128;
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} elsif ($_->{net} =~ /\./) {
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$numbits=32;
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} else {
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umask($oldmask);
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die "Network ".$_->{net}." appears to be malformed in networks table";
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}
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$maskn = Math::BigInt->new("0b".("1"x$maskbits).("0"x($numbits-$maskbits)));
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}
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$ctx->{nets}->{$_->{net}}->{mask} = $maskn;
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my $net = $_->{net};
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$net =~ s/\/.*//;
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$ctx->{nets}->{$_->{net}}->{netn} = getipaddr($net,GetNumber=>1);
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my $currzone;
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foreach $currzone (getzonesfornet($_)) {
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$ctx->{zonestotouch}->{$currzone} = 1;
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}
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}
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my $passtab = xCAT::Table->new('passwd');
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my $pent = $passtab->getAttribs({key=>'omapi',username=>'xcat_key'},['password']);
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if ($pent and $pent->{password}) {
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$ctx->{privkey} = $pent->{password};
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} #do not warn/error here yet, if we can't generate or extract, we'll know later
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my @entries = xCAT::TableUtils->get_site_attribute("forwarders");
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my $site_entry = $entries[0];
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if ( defined($site_entry)) {
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my @forwarders = split /[ ,]/,$site_entry;
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$ctx->{forwarders}=\@forwarders;
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}
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$ctx->{zonestotouch}->{$ctx->{domain}}=1;
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foreach (@networks) {
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if ($_->{domain}) {
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$ctx->{zonestotouch}->{$_->{domain}}=1;
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}
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}
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xCAT::SvrUtils::sendmsg("Getting reverse zones, this may take several minutes for a large cluster.", $callback);
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foreach (@nodes) {
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my @revzones = get_reverse_zones_for_entity($ctx,$_);;
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unless (@revzones) { next; }
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$ctx->{revzones}->{$_} = \@revzones;
|
|
foreach (@revzones) {
|
|
$ctx->{zonestotouch}->{$_}=1;
|
|
}
|
|
}
|
|
xCAT::SvrUtils::sendmsg("Completed getting reverse zones.", $callback);
|
|
|
|
if (1) {
|
|
#TODO: function to detect and return 1 if the master server is
|
|
# DNS SOA for all the zones we care about here, we are examining
|
|
# files to assure that our key is in named.conf, the zones we
|
|
# care about are there, and that if active directory is in use,
|
|
# allow the domain controllers to update specific zones
|
|
@entries = xCAT::TableUtils->get_site_attribute("directoryprovider");
|
|
$site_entry = $entries[0];
|
|
if ( defined($site_entry) and $site_entry eq 'activedirectory') {
|
|
@entries = xCAT::TableUtils->get_site_attribute("directoryservers");
|
|
$site_entry = $entries[0];
|
|
if ( defined($site_entry)) {
|
|
my @dservers = split /[ ,]/,$site_entry;
|
|
$ctx->{adservers} = \@dservers;
|
|
|
|
############################
|
|
# - should this include all domains?
|
|
# - multi-domains not supported with activedirectory
|
|
# - TODO in future release
|
|
###################
|
|
|
|
$ctx->{adzones} = {
|
|
"_msdcs.". $ctx->{domain} => 1,
|
|
"_sites.". $ctx->{domain} => 1,
|
|
"_tcp.". $ctx->{domain} => 1,
|
|
"_udp.". $ctx->{domain} => 1,
|
|
};
|
|
}
|
|
}
|
|
|
|
@entries = xCAT::TableUtils->get_site_attribute("dnsupdaters");
|
|
$site_entry = $entries[0];
|
|
if ( defined($site_entry) ) {
|
|
my @nservers = split /[ ,]/,$site_entry;
|
|
$ctx->{dnsupdaters} = \@nservers;
|
|
}
|
|
if ($zapfiles) { #here, we unlink all the existing files to start fresh
|
|
if (xCAT::Utils->isAIX())
|
|
{
|
|
system("/usr/bin/stopsrc -s $service");
|
|
}
|
|
else
|
|
{
|
|
system("service $service stop"); #named may otherwise hold on to stale journal filehandles
|
|
}
|
|
my $conf = get_conf();
|
|
unlink $conf;
|
|
my $DBDir = get_dbdir();
|
|
foreach (<$DBDir/db.*>) {
|
|
unlink $_;
|
|
}
|
|
}
|
|
#We manipulate local namedconf
|
|
$ctx->{dbdir} = get_dbdir();
|
|
$ctx->{zonesdir} = get_zonesdir();
|
|
chmod 0775, $ctx->{dbdir}; # assure dynamic dns can actually execute against the directory
|
|
|
|
update_namedconf($ctx);
|
|
update_zones($ctx);
|
|
|
|
# check if named is active before update dns records.
|
|
if (xCAT::Utils->isAIX())
|
|
{
|
|
my $cmd = "/usr/bin/lssrc -s $service |grep active";
|
|
my @output=xCAT::Utils->runcmd($cmd, 0);
|
|
if ($::RUNCMD_RC != 0)
|
|
{
|
|
system("/usr/bin/startsrc -s $service");
|
|
xCAT::SvrUtils::sendmsg("Starting named complete", $callback);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
my $cmd = "service $service status|grep running";
|
|
my @output=xCAT::Utils->runcmd($cmd, 0);
|
|
if ($::RUNCMD_RC != 0)
|
|
{
|
|
system("service $service start");
|
|
xCAT::SvrUtils::sendmsg("Starting named complete", $callback);
|
|
}
|
|
}
|
|
|
|
if ($ctx->{restartneeded}) {
|
|
xCAT::SvrUtils::sendmsg("Restarting $service", $callback);
|
|
|
|
if (xCAT::Utils->isAIX())
|
|
{
|
|
system("/usr/bin/stopsrc -s $service");
|
|
system("/usr/bin/startsrc -s $service");
|
|
}
|
|
else
|
|
{
|
|
system("service $service stop");
|
|
system("service $service start");
|
|
}
|
|
xCAT::SvrUtils::sendmsg("Restarting named complete", $callback);
|
|
}
|
|
} else {
|
|
unless ($ctx->{privkey}) {
|
|
xCAT::SvrUtils::sendmsg([1,"Unable to update DNS due to lack of credentials in passwd to communicate with remote server"], $callback);
|
|
}
|
|
}
|
|
#now we stick to Net::DNS style updates, with TSIG if possible. TODO: kerberized (i.e. Windows) DNS server support, maybe needing to use nsupdate -g....
|
|
if ($external)
|
|
{
|
|
# based on /etc/resolv.conf
|
|
$ctx->{resolver} = Net::DNS::Resolver->new();
|
|
}
|
|
else
|
|
{
|
|
# default to localhost
|
|
$ctx->{resolver} = Net::DNS::Resolver->new(nameservers=>['127.0.0.1']);
|
|
}
|
|
|
|
add_or_delete_records($ctx);
|
|
|
|
xCAT::SvrUtils::sendmsg("DNS setup is completed", $callback);
|
|
umask($oldmask);
|
|
}
|
|
|
|
sub get_zonesdir {
|
|
my $ZonesDir = get_dbdir();
|
|
|
|
my @entries = xCAT::TableUtils->get_site_attribute("bindzones");
|
|
my $site_entry = $entries[0];
|
|
|
|
if ( defined($site_entry) ) {
|
|
$ZonesDir= $site_entry;
|
|
}
|
|
|
|
return "$ZonesDir";
|
|
}
|
|
|
|
sub get_conf {
|
|
my $conf="/etc/named.conf";
|
|
|
|
# is this ubuntu ?
|
|
if ( $distro =~ /ubuntu.*/i || $distro =~ /debian.*/i ){
|
|
$conf="/etc/bind/named.conf";
|
|
}
|
|
|
|
my @entries = xCAT::TableUtils->get_site_attribute("bindconf");
|
|
my $site_entry = $entries[0];
|
|
|
|
if ( defined($site_entry) ) {
|
|
$conf= $site_entry;
|
|
}
|
|
|
|
return "$conf";
|
|
}
|
|
|
|
sub get_dbdir {
|
|
my $DBDir;
|
|
|
|
my @entries = xCAT::TableUtils->get_site_attribute("binddir");
|
|
my $site_entry = $entries[0];
|
|
if ( defined($site_entry) ) {
|
|
$DBDir = $site_entry;
|
|
}
|
|
|
|
if ( -d "$DBDir" ) {
|
|
return "$DBDir"
|
|
} elsif (-d "/var/named") {
|
|
return "/var/named/";
|
|
} elsif (-d "/var/lib/named") {
|
|
# Temp fix for bugzilla 73119
|
|
chown(scalar(getpwnam('root')),scalar(getgrnam('named')),"/var/lib/named");
|
|
return "/var/lib/named/";
|
|
}
|
|
elsif (-d "/var/lib/bind") {
|
|
return "/var/lib/bind/";
|
|
}
|
|
else {
|
|
mkpath "/var/named/";
|
|
chown(scalar(getpwnam('named')),scalar(getgrnam('named')),"/var/named");
|
|
return "/var/named/";
|
|
}
|
|
}
|
|
|
|
sub isvalidip {
|
|
#inet_pton/ntop good for ensuring an ip looks like an ip? or do string compare manually?
|
|
#for now, do string analysis, one problem with pton/ntop is that 010.1.1.1 would look diff from 10.1.1.1)
|
|
my $candidate = shift;
|
|
if ($candidate =~ /^(\d+)\.(\d+)\.(\d+).(\d+)\z/) {
|
|
return (
|
|
$1 >= 0 and $1 <= 255 and
|
|
$2 >= 0 and $2 <= 255 and
|
|
$3 >= 0 and $3 <= 255 and
|
|
$4 >= 0 and $4 <= 255
|
|
);
|
|
}
|
|
}
|
|
sub update_zones {
|
|
my $ctx = shift;
|
|
my $currzone;
|
|
my $dbdir = $ctx->{dbdir};
|
|
my $name = hostname;
|
|
my $node = $name;
|
|
|
|
# get the domain for the node - which is the local hostname
|
|
my ($host, $nip) = xCAT::NetworkUtils->gethostnameandip($node);
|
|
my @hosts;
|
|
push (@hosts, $host);
|
|
my $nd = xCAT::NetworkUtils->getNodeDomains(\@hosts);
|
|
my %nodedomains = %$nd;
|
|
my $domain = $nodedomains{$host};
|
|
|
|
xCAT::SvrUtils::sendmsg("Updating zones.", $callback);
|
|
|
|
unless ($domain =~ /^\./) {
|
|
$domain = '.'.$domain;
|
|
}
|
|
unless ($name =~ /\./) {
|
|
$name .= $domain;
|
|
}
|
|
unless ($name =~ /\.\z/) {
|
|
$name .= '.';
|
|
}
|
|
my $ip=$node;
|
|
if ($ctx->{hoststab} and $ctx->{hoststab}->{$node} and $ctx->{hoststab}->{$node}->[0]->{ip}) {
|
|
$ip = $ctx->{hoststab}->{$node}->[0]->{ip};
|
|
unless (isvalidip($ip)) {
|
|
xCAT::SvrUtils::sendmsg([1,"The hosts table entry for $node indicates $ip as an ip address, which is not a valid address"], $callback);
|
|
next;
|
|
}
|
|
} else {
|
|
unless ($ip = inet_aton($ip)) {
|
|
print "Unable to find an IP for $node in hosts table or via system lookup (i.e. /etc/hosts";
|
|
xCAT::SvrUtils::sendmsg([1,"Unable to find an IP for $node in hosts table or via system lookup (i.e. /etc/hosts"], $callback);
|
|
next;
|
|
}
|
|
$ip = inet_ntoa($ip);
|
|
}
|
|
my @neededzones = keys %{$ctx->{zonestotouch}};
|
|
push @neededzones,keys %{$ctx->{adzones}};
|
|
my ($sec, $min, $hour, $mday, $mon, $year, $rest) = localtime(time);
|
|
my $serial = ($mday * 100) + (($mon + 1) * 10000) + (($year + 1900) * 1000000);
|
|
|
|
foreach $currzone (@neededzones) {
|
|
my $zonefilename = $currzone;
|
|
if ($currzone =~ /IN-ADDR\.ARPA/) {
|
|
$currzone =~ s/\.IN-ADDR\.ARPA.*//;
|
|
my @octets = split/\./,$currzone;
|
|
$currzone = join('.',reverse(@octets));
|
|
$zonefilename = $currzone;
|
|
#If needed, the below, but it was a fairly painfully restricted paradigm for zonefile names...
|
|
#} elsif (not $zonefilename =~ /_/) {
|
|
# $zonefilename =~ s/\..*//; #compatible with bind.pm
|
|
}
|
|
unless (-f $dbdir."/db.$zonefilename") {
|
|
my $zonehdl;
|
|
open($zonehdl,">>",$dbdir."/db.$zonefilename");
|
|
flock($zonehdl,LOCK_EX);
|
|
seek($zonehdl,0,0);
|
|
truncate($zonehdl,0);
|
|
print $zonehdl '$TTL 86400'."\n";
|
|
print $zonehdl '@ IN SOA '.$name." root.$name ( $serial 10800 3600 604800 86400 )\n";
|
|
print $zonehdl " IN NS $name\n";
|
|
if ($name =~ /$currzone/) { #Must guarantee an A record for the DNS server
|
|
print $zonehdl "$name IN A $ip\n";
|
|
}
|
|
flock($zonehdl,LOCK_UN);
|
|
close($zonehdl);
|
|
if ( $distro =~ /ubuntu.*/i || $distro =~ /debian.*/i ){
|
|
chown(scalar(getpwnam('root')),scalar(getgrnam('bind')),$dbdir."/db.$zonefilename");
|
|
}
|
|
else{
|
|
chown(scalar(getpwnam('named')),scalar(getgrnam('named')),$dbdir."/db.$zonefilename");
|
|
}
|
|
$ctx->{restartneeded}=1;
|
|
}
|
|
}
|
|
xCAT::SvrUtils::sendmsg("Completed updating zones.", $callback);
|
|
}
|
|
|
|
sub update_namedconf {
|
|
my $ctx = shift;
|
|
my $namedlocation = get_conf();
|
|
my $nameconf;
|
|
my @newnamed;
|
|
my $gotoptions=0;
|
|
my $gotkey=0;
|
|
my %didzones;
|
|
|
|
if (-r $namedlocation) {
|
|
my @currnamed=();
|
|
open($nameconf,"<",$namedlocation);
|
|
flock($nameconf,LOCK_SH);
|
|
@currnamed=<$nameconf>;
|
|
flock($nameconf,LOCK_UN);
|
|
close($nameconf);
|
|
my $i = 0;
|
|
for ($i=0;$i<scalar(@currnamed);$i++) {
|
|
my $line = $currnamed[$i];
|
|
if ($line =~ /^options +\{/) {
|
|
$gotoptions=1;
|
|
my $skip=0;
|
|
do {
|
|
#push @newnamed,"\t\t//listen-on-v6 { any; };\n";
|
|
if ($ctx->{forwarders} and $line =~ /forwarders {/) {
|
|
push @newnamed,"\tforwarders \{\n";
|
|
$skip=1;
|
|
foreach (@{$ctx->{forwarders}}) {
|
|
push @newnamed,"\t\t".$_.";\n";
|
|
}
|
|
push @newnamed,"\t};\n";
|
|
} elsif ($skip) {
|
|
if ($line =~ /};/) {
|
|
$skip = 0;
|
|
}
|
|
} else {
|
|
push @newnamed,$line;
|
|
}
|
|
$i++;
|
|
$line = $currnamed[$i];
|
|
} while ($line !~ /^\};/);
|
|
push @newnamed,$line;
|
|
} elsif ($line =~ /^zone "([^"]*)" in \{/) {
|
|
my $currzone = $1;
|
|
if ($ctx->{zonestotouch}->{$currzone} or $ctx->{adzones}->{$currzone}) {
|
|
$didzones{$currzone}=1;
|
|
my @candidate = ($line);
|
|
my $needreplace=1;
|
|
do {
|
|
$i++;
|
|
$line = $currnamed[$i];
|
|
push @candidate,$line;
|
|
if ($line =~ /key xcat_key/) {
|
|
$needreplace=0;
|
|
}
|
|
} while ($line !~ /^\};/); #skip the old file zone
|
|
unless ($needreplace) {
|
|
push @newnamed,@candidate;
|
|
next;
|
|
}
|
|
$ctx->{restartneeded}=1;
|
|
push @newnamed,"zone \"$currzone\" in {\n","\ttype master;\n","\tallow-update {\n","\t\tkey xcat_key;\n";
|
|
my @list;
|
|
if (not $ctx->{adzones}->{$currzone}) {
|
|
if ($ctx->{dnsupdaters}) {
|
|
@list = @{$ctx->{dnsupdaters}};
|
|
}
|
|
} else {
|
|
if ($ctx->{adservers}) {
|
|
@list = @{$ctx->{adservers}};
|
|
}
|
|
}
|
|
foreach (@list) {
|
|
push @newnamed,"\t\t$_;\n";
|
|
}
|
|
if ($currzone =~ /IN-ADDR\.ARPA/) {
|
|
my $net = $currzone;
|
|
$net =~ s/.IN-ADDR\.ARPA.*//;
|
|
my @octets = split/\./,$net;
|
|
$net = join('.',reverse(@octets));
|
|
push @newnamed,"\t};\n","\tfile \"db.$net\";\n","};\n";
|
|
|
|
} else {
|
|
my $zfilename = $currzone;
|
|
#$zfilename =~ s/\..*//;
|
|
push @newnamed,"\t};\n","\tfile \"db.$zfilename\";\n","};\n";
|
|
}
|
|
} else {
|
|
push @newnamed,$line;
|
|
do {
|
|
$i++;
|
|
$line = $currnamed[$i];
|
|
push @newnamed,$line;
|
|
} while ($line !~ /^\};/);
|
|
}
|
|
|
|
} elsif ($line =~ /^key xcat_key/) {
|
|
$gotkey=1;
|
|
if ($ctx->{privkey}) {
|
|
#for now, assume the field is correct
|
|
#push @newnamed,"key xcat_key {\n","\talgorithm hmac-md5;\n","\tsecret \"".$ctx->{privkey}."\";\n","};\n\n";
|
|
push @newnamed,$line;
|
|
do {
|
|
$i++;
|
|
$line = $currnamed[$i];
|
|
push @newnamed,$line;
|
|
} while ($line !~ /^\};/);
|
|
} else {
|
|
push @newnamed,$line;
|
|
while ($line !~ /^\};/) { #skip the old file zone
|
|
if ($line =~ /secret \"([^"]*)\"/) {
|
|
my $passtab = xCAT::Table->new("passwd",-create=>1);
|
|
$passtab->setAttribs({key=>"omapi",username=>"xcat_key"},{password=>$1});
|
|
}
|
|
$i++;
|
|
$line = $currnamed[$i];
|
|
push @newnamed,$line;
|
|
}
|
|
}
|
|
} else {
|
|
push @newnamed,$line;
|
|
}
|
|
}
|
|
}
|
|
unless ($gotoptions) {
|
|
push @newnamed,"options {\n","\tdirectory \"".$ctx->{zonesdir}."\";\n";
|
|
push @newnamed,"\t\t//listen-on-v6 { any; };\n";
|
|
if ($ctx->{forwarders}) {
|
|
push @newnamed,"\tforwarders {\n";
|
|
foreach (@{$ctx->{forwarders}}) {
|
|
push @newnamed,"\t\t$_;\n";
|
|
}
|
|
push @newnamed,"\t};\n";
|
|
}
|
|
push @newnamed,"};\n\n";
|
|
}
|
|
unless ($gotkey) {
|
|
unless ($ctx->{privkey}) { #need to generate one
|
|
$ctx->{privkey} = encode_base64(genpassword(32));
|
|
chomp($ctx->{privkey});
|
|
}
|
|
push @newnamed,"key xcat_key {\n","\talgorithm hmac-md5;\n","\tsecret \"".$ctx->{privkey}."\";\n","};\n\n";
|
|
$ctx->{restartneeded}=1;
|
|
}
|
|
my $zone;
|
|
foreach $zone (keys %{$ctx->{zonestotouch}}) {
|
|
if ($didzones{$zone}) { next; }
|
|
$ctx->{restartneeded}=1; #have to add a zone, a restart will be needed
|
|
push @newnamed,"zone \"$zone\" in {\n","\ttype master;\n","\tallow-update {\n","\t\tkey xcat_key;\n";
|
|
foreach (@{$ctx->{dnsupdaters}}) {
|
|
push @newnamed,"\t\t$_;\n";
|
|
}
|
|
if ($zone =~ /IN-ADDR\.ARPA/) {
|
|
my $net = $zone;
|
|
$net =~ s/.IN-ADDR\.ARPA.*//;
|
|
my @octets = split/\./,$net;
|
|
$net = join('.',reverse(@octets));
|
|
push @newnamed,"\t};\n","\tfile \"db.$net\";\n","};\n";
|
|
|
|
} else {
|
|
my $zfilename = $zone;
|
|
#$zfilename =~ s/\..*//;
|
|
push @newnamed,"\t};\n","\tfile \"db.$zfilename\";\n","};\n";
|
|
}
|
|
}
|
|
foreach $zone (keys %{$ctx->{adzones}}) {
|
|
if ($didzones{$zone}) { next; }
|
|
$ctx->{restartneeded}=1; #have to add a zone, a restart will be needed
|
|
push @newnamed,"zone \"$zone\" in {\n","\ttype master;\n","\tallow-update {\n","\t\tkey xcat_key;\n";
|
|
foreach (@{$ctx->{adservers}}) {
|
|
push @newnamed,"\t\t$_;\n";
|
|
}
|
|
my $zfilename = $zone;
|
|
#$zfilename =~ s/\..*//;
|
|
push @newnamed,"\t};\n","\tfile \"db.$zfilename\";\n","};\n\n";
|
|
}
|
|
|
|
# For AIX, add a hint zone
|
|
if (xCAT::Utils->isAIX())
|
|
{
|
|
unless (grep(/hint/, @newnamed))
|
|
{
|
|
push @newnamed,"zone \"\.\" in {\n","\ttype hint;\n","\tfile \"db\.cache\";\n","};\n\n";
|
|
# Toutch the stub zone file
|
|
system("/usr/bin/touch $ctx->{dbdir}.'/db.cache'");
|
|
$ctx->{restartneeded}=1;
|
|
if($ctx->{forwarders})
|
|
{
|
|
my $dbcachefile = $ctx->{dbdir}.'/db.cache';
|
|
my $cmd = qq~dig @"$ctx->{forwarders}[0]" . ns >> $dbcachefile~;
|
|
my $outref = xCAT::Utils->runcmd("$cmd", 0);
|
|
if ($::RUNCMD_RC != 0)
|
|
{
|
|
my $rsp = {};
|
|
$rsp->{data}->[0] = "Failed to run command: $cmd.\n";
|
|
xCAT::MsgUtils->message("W", $rsp, $callback, 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
my $newnameconf;
|
|
open($newnameconf,">>",$namedlocation);
|
|
flock($newnameconf,LOCK_EX);
|
|
seek($newnameconf,0,0);
|
|
truncate($newnameconf,0);
|
|
for my $l (@newnamed) { print $newnameconf $l; }
|
|
flock($newnameconf,LOCK_UN);
|
|
close($newnameconf);
|
|
if ( $distro =~ /ubuntu.*/i || $distro =~ /debian.*/i ){
|
|
chown (scalar(getpwnam('root')),scalar(getgrnam('bind')),$namedlocation);
|
|
}
|
|
else{
|
|
chown (scalar(getpwnam('root')),scalar(getgrnam('named')),$namedlocation);
|
|
}
|
|
}
|
|
|
|
sub add_or_delete_records {
|
|
my $ctx = shift;
|
|
|
|
xCAT::SvrUtils::sendmsg("Updating DNS records, this may take several minutes for a large cluster.", $callback);
|
|
|
|
unless ($ctx->{privkey}) {
|
|
my $passtab = xCAT::Table->new('passwd');
|
|
my $pent = $passtab->getAttribs({key=>'omapi',username=>'xcat_key'},['password']);
|
|
if ($pent and $pent->{password}) {
|
|
$ctx->{privkey} = $pent->{password};
|
|
} else {
|
|
xCAT::SvrUtils::sendmsg([1,"Unable to find omapi key in passwd table"], $callback);
|
|
}
|
|
}
|
|
my $node;
|
|
my @ips;
|
|
|
|
$ctx->{nsmap} = {}; #will store a map to known NS records to avoid needless redundant queries to sort nodes into domains
|
|
$ctx->{updatesbyzone}={}; #sort all updates into their respective zones for bulk update for fewer DNS transactions
|
|
|
|
# get node domains
|
|
my $nd = xCAT::NetworkUtils->getNodeDomains(\@{$ctx->{nodes}});
|
|
my %nodedomains = %{$nd};
|
|
|
|
foreach $node (@{$ctx->{nodes}}) {
|
|
my $name = $node;
|
|
|
|
if (($name =~ /loopback/) || ($name =~ /localhost/))
|
|
{
|
|
next;
|
|
}
|
|
|
|
my $domain = $nodedomains{$node};
|
|
unless ($domain =~ /^\./) { $domain = '.'.$domain; }
|
|
|
|
unless ($name =~ /$domain/) { $name .= $domain } # $name needs to represent fqdn, but must preserve $node as a nodename for cfg lookup
|
|
|
|
if ($ctx->{hoststab} and $ctx->{hoststab}->{$node} and $ctx->{hoststab}->{$node}->[0]->{ip}) {
|
|
@ips = ($ctx->{hoststab}->{$node}->[0]->{ip});
|
|
} else {
|
|
@ips = getipaddr($node,GetAllAddresses=>1);
|
|
if (!defined($ips[0])) {
|
|
xCAT::SvrUtils::sendmsg([1,"Unable to find an IP for $node in hosts table or via system lookup (i.e. /etc/hosts)"], $callback);
|
|
next;
|
|
}
|
|
}
|
|
foreach my $ip (@ips) {
|
|
$ctx->{currip}=$ip;
|
|
#time to update, A and PTR records, IPv6 still TODO
|
|
if ($ip =~ /\./) { #v4
|
|
$ip = join('.',reverse(split(/\./,$ip)));
|
|
$ip .= '.IN-ADDR.ARPA.';
|
|
} elsif ($ip =~ /:/) { #v6
|
|
$ip=getipaddr($ip,GetNumber=>1);
|
|
$ip=$ip->as_hex();
|
|
$ip =~ s/^0x//;
|
|
$ip = join('.',reverse(split(//,$ip)));
|
|
$ip .= '.ip6.arpa.';
|
|
} else {
|
|
die "ddns did not understand $ip result of lookup";
|
|
}
|
|
#ok, now it is time to identify which zones should actually hold the forward (A) and reverse (PTR) records and a nameserver to handle the request
|
|
my $revzone = $ip;
|
|
$ctx->{currnode}=$node;
|
|
$ctx->{currname}=$name;
|
|
$ctx->{currrevname}=$ip;
|
|
my $tmpdm;
|
|
unless ($domain =~ /\.$/) { $tmpdm = $domain.'.'; } #example.com becomes example.com.
|
|
|
|
find_nameserver_for_dns($ctx,$revzone);
|
|
find_nameserver_for_dns($ctx,$tmpdm);
|
|
}
|
|
}
|
|
my $zone;
|
|
foreach $zone (keys %{$ctx->{updatesbyzone}}) {
|
|
my $ip = xCAT::NetworkUtils->getipaddr($ctx->{nsmap}->{$zone});
|
|
|
|
my $resolver = Net::DNS::Resolver->new(nameservers=>[$ip]);
|
|
my $entry;
|
|
my $numreqs = 300; # limit to 300 updates in a payload, something broke at 644 on a certain sample, choosing 300 for now
|
|
my $update = Net::DNS::Update->new($zone);
|
|
foreach $entry (@{$ctx->{updatesbyzone}->{$zone}}) {
|
|
if ($ctx->{deletemode}) {
|
|
$update->push(update=>rr_del($entry));
|
|
} else {
|
|
$update->push(update=>rr_add($entry));
|
|
}
|
|
$numreqs -= 1;
|
|
if ($numreqs == 0) {
|
|
$update->sign_tsig("xcat_key",$ctx->{privkey});
|
|
$numreqs=300;
|
|
my $reply = $resolver->send($update);
|
|
if ($reply)
|
|
{
|
|
if ($reply->header->rcode ne 'NOERROR')
|
|
{
|
|
xCAT::SvrUtils::sendmsg([1,"Failure encountered updating $zone, error was ".$reply->header->rcode], $callback);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
xCAT::SvrUtils::sendmsg([1,"No reply received when sending DNS update to zone $zone"], $callback);
|
|
}
|
|
|
|
$update = Net::DNS::Update->new($zone); #new empty request
|
|
}
|
|
}
|
|
if ($numreqs != 300) { #either no entries at all to begin with or a perfect multiple of 300
|
|
$update->sign_tsig("xcat_key",$ctx->{privkey});
|
|
my $reply = $resolver->send($update);
|
|
if ($reply)
|
|
{
|
|
if ($reply->header->rcode ne 'NOERROR')
|
|
{
|
|
xCAT::SvrUtils::sendmsg([1,"Failure encountered updating $zone, error was ".$reply->header->rcode], $callback);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
xCAT::SvrUtils::sendmsg([1,"No reply received when sending DNS update to zone $zone"], $callback);
|
|
}
|
|
|
|
# sometimes resolver does not work if the update zone request sent so quick
|
|
sleep 1;
|
|
}
|
|
}
|
|
xCAT::SvrUtils::sendmsg("Completed updating DNS records.", $callback);
|
|
}
|
|
sub find_nameserver_for_dns {
|
|
my $ctx = shift;
|
|
my $zone = shift;
|
|
my $node = $ctx->{currnode};
|
|
my $ip = $ctx->{currip};
|
|
my $rname = $ctx->{currrevname};
|
|
my $name = $ctx->{currname};
|
|
unless ($name =~ /\.\z/) { $name .= '.' }
|
|
my @rrcontent;
|
|
if ($ip =~ /:/) {
|
|
@rrcontent = ( "$name IN AAAA $ip" );
|
|
} else {
|
|
@rrcontent = ( "$name IN A $ip" );
|
|
}
|
|
foreach (keys %{$ctx->{nodeips}->{$node}}) {
|
|
unless ($_ eq $ip) {
|
|
if ($_ =~ /:/) {
|
|
push @rrcontent,"$name IN AAAA $_";
|
|
} else {
|
|
push @rrcontent,"$name IN A $_";
|
|
}
|
|
}
|
|
}
|
|
|
|
if (defined $ctx->{aliases}->{$node}) {
|
|
foreach (keys %{$ctx->{aliases}->{$node}}) {
|
|
push @rrcontent, "$_ IN CNAME $name";
|
|
}
|
|
}
|
|
if ($ctx->{deletemode}) {
|
|
push @rrcontent,"$name TXT";
|
|
push @rrcontent,"$name A";
|
|
}
|
|
if ($zone =~ /IN-ADDR.ARPA/ or $zone =~ /ip6.arpa/) { #reverse style
|
|
@rrcontent = ("$rname IN PTR $name");
|
|
}
|
|
while ($zone) {
|
|
unless (defined $ctx->{nsmap}->{$zone}) { #ok, we already thought about this zone and made a decision
|
|
if ($zone =~ /^\.*192.IN-ADDR.ARPA\.*/ or $zone =~ /^\.*172.IN-ADDR.ARPA\.*/ or $zone =~ /127.IN-ADDR.ARPA\.*/ or $zone =~ /^\.*IN-ADDR.ARPA\.*/ or $zone =~ /^\.*ARPA\.*/) {
|
|
$ctx->{nsmap}->{$zone} = 0; #ignore zones that are likely to appear, but probably not ours
|
|
} elsif ($::XCATSITEVALS{ddnsserver}) {
|
|
$ctx->{nsmap}->{$zone} = $::XCATSITEVALS{ddnsserver};
|
|
} else {
|
|
my $reply = $ctx->{resolver}->query($zone,'NS');
|
|
if ($reply) {
|
|
if ($reply->header->rcode ne 'NOERROR') {
|
|
xCAT::SvrUtils::sendmsg([1,"Failure encountered querying $zone, error was ".$reply->header->rcode], $callback);
|
|
}
|
|
foreach my $record ($reply->answer) {
|
|
if ( $record->nsdname =~ /blackhole.*\.iana\.org/) {
|
|
$ctx->{nsmap}->{$zone} = 0;
|
|
} else {
|
|
$ctx->{nsmap}->{$zone} = $record->nsdname;
|
|
}
|
|
}
|
|
} else {
|
|
$ctx->{nsmap}->{$zone} = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($ctx->{nsmap}->{$zone}) { #we have a nameserver for this zone, therefore this zone is one to update
|
|
push @{$ctx->{updatesbyzone}->{$zone}},@rrcontent;
|
|
last;
|
|
} else { #we have it defined, but zero, means search higher domains. Possible to shortcut further by pointing to the right domain, maybe later
|
|
if ($zone !~ /\./) {
|
|
xCAT::SvrUtils::sendmsg([1,"Unable to find reverse zone to hold $node"], $callback,$node);
|
|
last;
|
|
}
|
|
|
|
$zone =~ s/^[^\.]*\.//; #strip all up to and including first dot
|
|
unless ($zone) {
|
|
xCAT::SvrUtils::sendmsg([1,"Unable to find zone to hold $node"], $callback,$node);
|
|
last;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
sub genpassword
|
|
{
|
|
|
|
#Generate a pseudo-random password of specified length
|
|
my $length = shift;
|
|
my $password = '';
|
|
my $characters =
|
|
'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890';
|
|
srand; #have to reseed, rand is not rand otherwise
|
|
while (length($password) < $length)
|
|
{
|
|
$password .= substr($characters, int(rand 63), 1);
|
|
}
|
|
return $password;
|
|
}
|
|
|
|
sub makedns_usage
|
|
{
|
|
my $callback = shift;
|
|
|
|
my $rsp;
|
|
push @{$rsp->{data}},
|
|
"\n makedns - sets up domain name services (DNS).";
|
|
push @{$rsp->{data}}, " Usage: ";
|
|
push @{$rsp->{data}}, "\tmakedns [-h|--help ]";
|
|
push @{$rsp->{data}}, "\tmakedns [-e|--external] [-n|--new ] [noderange]";
|
|
push @{$rsp->{data}}, "\tmakedns [-e|--external] [-d|--delete noderange]";
|
|
push @{$rsp->{data}}, "\n";
|
|
xCAT::MsgUtils->message("I", $rsp, $callback);
|
|
return 0;
|
|
}
|
|
|
|
1;
|